Internet Engineering Task Force (IETF) JP. Vasseur, Ed.
Request for Comments: 5886 Cisco Systems, Inc.
Category: Standards Track JL. Le Roux
ISSN: 2070-1721 France Telecom
Y. Ikejiri
NTT Communications Corporation
June 2010
A Set of Monitoring Tools for
Path Computation Element (PCE)-Based Architecture
Abstract
A Path Computation Element (PCE)-based architecture has been
specified for the computation of Traffic Engineering (TE) Label
Switched Paths (LSPs) in Multiprotocol Label Switching (MPLS) and
Generalized MPLS (GMPLS) networks in the context of single or
multiple domains (where a domain refers to a collection of network
elements within a common sphere of address management or path
computational responsibility such as Interior Gateway Protocol (IGP)
areas and Autonomous Systems). Path Computation Clients (PCCs) send
computation requests to PCEs, and these may forward the requests to
and cooperate with other PCEs forming a "path computation chain".
In PCE-based environments, it is thus critical to monitor the state
of the path computation chain for troubleshooting and performance
monitoring purposes: liveness of each element (PCE) involved in the
PCE chain and detection of potential resource contention states and
statistics in terms of path computation times are examples of such
metrics of interest. This document specifies procedures and
extensions to the Path Computation Element Protocol (PCEP) in order
to gather such information.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Further information on
Internet Standards is available in Section 2 of RFC 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc5886.
Vasseur, et al. Standards Track [Page 1]RFC 5886 Monitoring Tools for PCE-Based Architecture June 2010Copyright Notice
Copyright (c) 2010 IETF Trust and the persons identified as the
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described in the Simplified BSD License.
Vasseur, et al. Standards Track [Page 2]RFC 5886 Monitoring Tools for PCE-Based Architecture June 2010Table of Contents
1. Introduction ....................................................4
1.1. Requirements Language ......................................5
2. Terminology .....................................................5
3. Path Computation Monitoring Messages ............................6
3.1. Path Computation Monitoring Request (PCMonReq) Message .....6
3.2. Path Monitoring Reply (PCMonRep) Message ...................9
4. Path Computation Monitoring Objects ............................11
4.1. MONITORING Object .........................................11
4.2. PCC-ID-REQ Object .........................................13
4.3. PCE-ID Object .............................................14
4.4. PROC-TIME Object ..........................................15
4.5. OVERLOAD Object ...........................................17
5. Policy .........................................................18
6. Elements of Procedure ..........................................18
7. Manageability Considerations ...................................20
7.1. Control of Function and Policy ............................20
7.2. Information and Data Models ...............................20
7.3. Liveness Detection and Monitoring .........................20
7.4. Verify Correct Operations .................................20
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